Happy to (try to) help. I'm on mobile atm so forgive the ssh screenshot. You just need to edit your vifmrc config file. Which you can likely find in your home directory; something like ~/.config/vifm/vifmrc
somewhere in that file (probably near the included command entries for organization's sake) you can add the line:
command! hardlink ln %r ./
Then save the file. Here's the relevant bit of my vifmrc as an example:
In all subsequent instances of vifm you'll be able to type :hardlink
to place hardlinks for each item in your current selection into the current directory.
If this is something you do often you could also map some keys to this command to avoid the typing. Just add
nnoremap ah :hardlink<cr>
to vifmrc as previously discussed.